Circuit and method of generating a boosted voltage

Details Circuit and method of generating a boosted voltage Circuit and method of generating a boosted voltage

2006-08-01

2006-08-01

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S536000, C365S198000

Reexamination Certificate

active

07084675

ABSTRACT:
Provided is a circuit and method of generating a boosted voltage while maintaining a constant difference between the boosted voltage and an array reference voltage when the array reference voltage is varied in a normal mode, a test mode, and a burn-in test mode of a semiconductor device. The boosted voltage generating circuit comprises a sensing signal generating circuit which generates a sensing signal, a pulse generating circuit which generates a driving signal in response to the sensing signal, and a pumping circuit which generates the boosted voltage in response to the driving signal to control a word line of a semiconductor device. The sensing signal generating circuit comprises a comparator which includes a first input terminal, a second input terminal for receiving a reference voltage, and an output terminal for outputting the sensing signal, a resistor coupled between the boosted voltage and the first input terminal, and a constant current source coupled between the first input terminal and a ground voltage.

REFERENCES:
patent: 6195307 (2001-02-01), Umezawa et al.
patent: 6281716 (2001-08-01), Mihara
patent: 6373325 (2002-04-01), Kuriyama
patent: 6469573 (2002-10-01), Kanda et al.
patent: 6737907 (2004-05-01), Hsu et al.
patent: 6826066 (2004-11-01), Kozaru

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